Locomotive-boiler



(No Mdel.) 2 sheets-sheet 1.

W. B. MACK.

LOGOMOTIVE BOILER. i

Patented July 4, 1.893.

(No Model.)

2 Sheets-Sheet 2.

W. B. MACK. LUGOMOTIVB BUILBR.

` Patented July 4,' 18.93.

UNITED STATES PATENT OFFICE..

WILLIAM B. MACK, OF BOSTON, MASSACHSETTS.

LOCOMOTIVE-BOILER.

SPECIFICATION forming part of Letters Patent No. 500,716, dated July 4, 1893.

Application filed November 5, 1892. Serial No. 451,024.

(No model.)

To all whom it may concern.-

Be it known that I, WILLIAM B. MACK, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Locomotive-Boilers, of which the following is a specification.

My invention relates to improvements in locomotive boilers in which a conduit leading from the part of theboiler communicates with the'lower l'ront portion of the waterleg surrounding the fire-box, thus insuring a constant circulation of water.

This invention relates" particularly to improvements in the form of connection between the conduit within the boiler and the water-leg, as described in Letters Patent No. 487,535, granted to me December 6, 1892. The connection there described, consisting of a dished plate of peculiar form riveted to both the boiler and water-leg, was found in practice to be difficult to manufacture and also to keep the joint watertight, and to overcome the objections I employ the the construction illustrated in the accompanying drawings, in which- Figure l, is a longitudinal, central, vertical section of a locomotive boiler provided with my improvements. Fig. 2, is an end elevation; Fig. 3, a partial transverse section on the line 3-3 Fig. 2; Fig. 4, a perspective view of the connecting frame; Fig. 5, a side elevation showing the whole external connection. Figs. 6, 7, 8 and 9, are views corresponding to Figs. l, 2, 3, and 4, and show a modification of my construction.

In the drawings in which like letters and figures of reference indicate like parts: ais a locomotive boiler provided with the fire box ZJ, surrounded by a water-leg c, all of the usual construction. Within the boiler is a conduit d, leading from the forward portion, to an orilice e in the bottom of the boiler near the water-leg, and from this orifice an external connection f conducts the water from the boiler to the water-leg through two orifices g g. The connection f I construct as follows: 'lo the front of the water-leg is secured a double iianged frame 7?. preferably of an inverted T-shape, by riveting through the outwardly turned flange t', while to the inwardly turned liange Z is secured a covering plate 7.; forming with the frame a box. This plate is further secured by two rods m, m, which pass through the plate and the front of the Water-leg to the front of the fire-box and are riveted in place. Near the upper central portion of plate la is an orifice n which is surrounded by atianged collar o. Orifice ealso hasa flanged collar p and these are connected by the similarly flanged pipe q completing the connection. Pipe g which is secured in place by bolts may be readily removed for the purpose of clearing the connection of accumulated sediment.

In the modification illustrated in Figs. 6, 7, S and 9 I substitute for the flanged frame, covering plate and pipe, a frame 71.', the lower portion 2 being of the general inverted T- shape surrounding the orifice g g in the Water-leg, while the upper portion 3 is bent forward at right angles to that below, and surrounds the oriiice e in the bottom of the boiler. A covering plate, bent to conform to the frame, is placed over it, and both frame and plate are riveted together to the waterleg and boiler. Four rods m secure the covering plate to the front of the fire-box.

'All the parts in this construction are readily Inanufactured and secured to make a water-tight front.

I cla-irnl. In a locomotive boiler havingan interior conduit, opening through the bottom of the boiler, and a water-leg having orifices in its rear, the combination of a frame secured about orifices in the water-leg, a coveringplate for said frame forming a box, and a connection between the box and the conduit opening in the boiler.

2. In a locomotive the combination of a frame secured about orifices inthe water-leg, and bearing on the rear wall of the latter a covering-plate for said frame having an orifice, and a pipe connecting the orifice in the plate with one in the boiler.

3. In a locomotive boiler the combination of a frame secured about orifices in the water-leg, and bearing on the rear wall of the latter a covering-plate for said frame having an oriiice,and a pipe, removablysecured, for connecting` the orice in the coveringplate with one in the boiler.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 31st day of August, A. D. 1892.

WILLIAM B. MACK.

Witnesses: C. F. BROWN, M. W. JACKSON.

IOO 

